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Finding the Fourth Proportional to 217,688.68, 326,407.30 and 84,413.24

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Solution

The fourth proportional to 217,688.68, 326,407.30 and 84,413.24 is: 126,571.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,688.68 : 326,407.30 = 84,413.24 : x
  2. Step 2: Convert to fraction form
    217,688.68/326,407.30 = 84,413.24/x
  3. Step 3: Cross multiply
    217,688.68x = 326,407.30 × 84,413.24
  4. Step 4: Simplify right side
    217,688.68x = 27,553,097,752.65
  5. Step 5: Solve for x
    x = 27,553,097,752.65/217,688.68
  6. Step 6: Final answer
    x = 126,571.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.